Cutting-machine



E. M. WARING.

CUTTING MACHINE.

APPLICATION FILED MAY 26, 1916.

Patented July 12, 1921.v

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IN VEN TOR.

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EDWARD MI. WARING, OF BROOKLYN, NEW YORK.

CUTTING-REACHINE.

Application filed May 26,

To all whom it may concern:

Be it known that I, EDWARD M. WARING, a citizen of the United States,and resident of New York, borough of Brooklyn, in the county of Kingsand State of New York, have invented certain new and useful Improvementsin Cutting-lvlachines, of which th following is a specification.

This invention relates to improvements in electric cutting machines. Oneobject of the invention is to provide a generally improved cuttingmachine. Another object 18 to provide a novel form of guard and guardoperating means in. combination with the sharpening. means of the knife.7

With these and other objects in View, my invention comprises an electriccutting ma chine as hereinafter described and as illustrated in theaccompanying drawings, in which Figure 1. is a lefthand side elevationof my improved cutting machine showing the motor attached to the frame;

Fig. 2. is a right-hand side elevation of the machine showing myimproved guard and grinder with controlsand other parts in position;

Fig. 3.. is a plan view of the upper part of the standard showing myimproved means for bringing the sharpening device into working contactwith the knife and at. the same time removing the guard from its path;

Fig. 4. is a detail plan view of the control lever and handle separatedfrom the other parts;

Fig. 5. shows the guard or member which actually covers the edge of theknife;

Figs. 6. and 7 show respectively in plan and elevation the pivotedfulcrum for the control lever and handle shown in Figs. 8 and 4; v

' Fig. 8. shows how the guard tips sidewise to pass th grinder pull rodor any other obstruction; and

Fig. 9. shows how the guard part may be raised almost to the top of theknife to permit cutting of extra high piles of fabric.

In the drawings, thev reference numeral 15 denotes the motor of anysuitable design and construction of the type having a vertical motorshaft as will be understood by those skilledin the art.

The motor is provided with hub 19 through which the armature shaftprojects.

The hub 19 fits into the aperture 20 in the Specification of LettersPatent.

Patented July 12, 1921. 1916. Serial No.100,015.-

standard and is located in position by a set screw 61, see Figs. 1 and 3and clasped securely by screws shown in Figs. 2 and 3.

The'motor may be provided with an elec tric light attachment toilluminate the work, provision is made for this as indicated at 18 inFig. 2, which only shows what is intended to represent a tapped hole toreceive a lamp socket and connecting. wires. In this position the lightshines directly upon the work but is screened from the eyes-0f theoperator by the motor without any other shade being necessary.

The operation of electric cutting machines in the prior art has beenexceedingly clangerous and severe accidents'to the operators fromcontact with the knife have been of frequent occurrence because theknives of cutting machines are driven at a high rate of speed in orderto cut the goods rapidly and accidental contact is almost sure to resultseriously. In the past, many electric cutting machines have beeninadequately guarded, some being provided with guards that are onlyadjustable by unscrewing a clamp near the front of the knife, a dangerous operation in itself; and all other guards that I have seen, exceptthose of my invention, are objectionable because they are supported orhang or project over the side of the knife toward the operator andinterfere with his manipulation of the goods, besides being partly inhis lin of vision so that many operators of electric cutting machineswork without a guard or adjust the guard to its uppermost position whereit is of no value for protection. further objection to some of theguards in the prior art is that, being secured so as to partly cover theside of the knife toward the operator and away from the supportingstandard they are in the way of the removal of the knife from the frameof the machine and the operator, when compelled to take the guard off ormove it out of the way to change the knife, frequently leaves the guardoff or in a position that affords no protection. The guard hereindescribed and illustrated overcomes all the above objections.

Referring now to Figs. 1 to 9 inclusive the several parts of the machineare mounted upon the standard or main frame 70 which rests upon the base71. As already pointed out, the motor is secured to the standard byclamping the hub 19 in the boss 20 in the standard. 3 1 is the knifewhich is mounted with a finger piece 36 on the standard and driven fromthe motor in a well-known manner. 33 represents the handle of themachine. 30, 31 and 32 represent means for attaching a plug and cablefrom a lamp socket to supply current to the motor. push buttons 56 and57 for turning the current on and off respectively. To the standard ispivoted at 46, Fig 3, an arm 45 provided with an aperture 47. A portion72 of said arm forms a bearing for'the fulcrum pin v38 of the guardoperatinglever 37, pivoted on said arm 45, and adapted to be ad- 'ustedthereon by means of a friction washer 3. The guard operating lever isprovided and the opposite end 41 of said lever passes through a hole39in a lug 40 on the knife guard 35. Thesaid lug is provided with twopins or horns 4:2, 4:3, adapted to be engaged by the guard spring 44secured to the lever 37 as will appear hereinafter.

. The knife sharpening means are in the form of abrasive wheels 52, 53,carried by the grinder frame 51 which is pivoted to the standard aboveand in frontof the knife in the usual manner and which is kept in normalraised position by a suitable spring 54, see Fig. 3. The grinder frameis provided with a member 50 which is engaged by the grinder pull rod48, as shown and which rod passes through the said aperture 47 in thearm 45 and is secured by a washer and nut 49.

From the foregoing description it will be clear that the lever 37 may beoperated in a vertical plane on the pivot 38, and also, through theinstrumentality ofthe arm 45,

be operated to swing outwardly from the standard on the fulcrum at 46.The guard 35 effectively covers the forward edge of the knife to a pointso near the base that there is not sufiici'ent room for the finger ofthe operator. to pass and come in contact with the sharp edge of theknife. When it is desired to out only a few layers of cloth that willpass easily under the guard in its lowermost position, the operatormerely pushes the machine into contact with the goods, following anysuitable means or patterns upon the top. When it isdesired to cut agreater number of thicknesses, the operator pushes the finger piece 36vertically downward by pressure of his fore finger until the guard 35 atthe other end of the lever 37 fulcrumed at 38, is raised to thedesiredheight, This upward movement may be continued until the guard 35takes the position shown in Fig. 9. thereby exposing the maximumavailable cutting edge of the knife to permit the operation of themachine upon the highest piles of fabrics possible for the size of themachine in hand.

When the operator desires to sharpen the knife, he has only to press thefinger piece 36 inwardly and the lever 37 carrying the guard 35 willswing outwardly away from The switch 58 is provided with the the path ofthe abrasive wheels 52 and 53 during which operation the arm 45, whichcarries the lever 37, swings horizontally on the pivot at 46 and theabrasive wheels will be brought into grinding contact with the knifethrough the instrumentality of the pull rod 4L8. When the pressure uponthe finger piece 36 is removed, the spring 55 operates to raise thegrinder frame 51 with the abrasive wheels 52 and. 53 out of contact withthe knife and back into their former position and of course alsooperates to pull the guard back into guarding position throughtheintervening mechanism previously described.

When the guard 35 is adjusted to ac'commodate thick layers of cloth andoperated laterally away from the knife to make room for the grindingwheels into contact with the pull rod 48 but is easily turned on thepart 4.1 and after passing the same is restored to its verticalpositionby the pressure due to the distortion of the spring 44: by the horn 4:2and &3. In returning to its former position in front of the knife theguard is again tipped as it passes the pull rod and is restored asbefore.

From the foregoing description itwill be seen that the construction isparticularly well adapted for small machines. It is an importantfeatures and of great practicaladvantage that the knife may be sharpenedby the grinding wheels without detachinglthe guard fromthe machine andatthe same time provide a guard which may be operated on the far side ofthe machine away from the operator. It is also especially worthy ofnotice that the vertical adjustment of the guard is not disturbed by thegrinding operation, even when the guard is adjusted to an extreme upperposition, i

While I have described the invention with reference to a specificdisclosure, it will be.

understood that I do not wish to be limited thereto, but that theconstruction may be varied within the scope of the claims. Y

I claim.

it will be brought 1. In a cloth cutting machine, the combi:

nation of aknife, a" guard for the same, sharpening wheels for saidknife, a member for moving said sharpening wheels into con-] tact withthe knife, a pivoted'arm for actuating the said member and a guardoperating lever pivoted on the said arm.

2. In a cloth cutting machine, nation witha standard, a knife mounted onthe one side thereof,a guard for saidknife supported on the other sideof the standard, sharpening wheels for the knife, means for operatingsaid guard away'from the latter to permit the lowering of saidsharpening wheels into contact with the knife, said the combi meanscomprlsing an arm pivoted to {swing in a horizontal plane, a memberconnected to sa d arm and the said sharpening wheels, a guardlever'pivoted on said arm to move in a vertical plane with respectthereto and a finger piece on said guard lever for operating the latterand the said arm.

3. The combination of supporting means, a knife mounted thereon, a knifeguard, knife sharpening means, an arm pivoted to said supporting means,guard operating means pivoted on said arm and connecting means betweenthe latter and the said knife sharpening means.

4. The combination of a standard, a knife, grinding wheels for saidknife, a knife guard, a guard lever for operating said guard, a rod formoving the grinding wheels into contact with the knife, a pivotedsupporting member for said guard lever and rod, whereby when the saidguard is moved away from the knife the grinding wheels are brought intocontact with the knife.

5. The combination of a standard, a knife, a knife guard, knifesharpening means, mechanism for moving said guard away from the knifewhile moving the said sharpening means into contact with the knife, saidmechanism comprising an arm pivoted to the said standard to swing in ahorizontal plane, a guard operating lever pivoted on said arm to swingin a vertical plane and a connecting rod between the said arm and thesharpenin means.

%igned at New York, in the county of New York and State of New York,this 25th day of May, A. D. 1916.

EDWARD M. WARJING.

